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MergedCode Learn is the hub for software engineering practice in one workspace: MergedSheet DSA problems with multi-language solutions, Core CS theory (DBMS, Operating Systems, Computer Networks, OOP), seven AI paths (LLMs through Trust & Ship), Python under Languages, and LLD/HLD system design with Excalidraw diagrams. Start with the free open lessons and problems below, then unlock the full library with Pro — progress syncs on web and Android.
Subject hubs
- Data Structures and Algorithms
- Computer Networking
- Database Management Systems
- Object-Oriented Programming
- Operating Systems
- How LLMs Work
- Talk to Models
- Knowledge Systems
- Agent Systems
- Own Your Models
- Beyond Text
- Trust & Ship
- Python
- System Design
- System Design Fundamentals
- LLD Theory
- LLD Problems
- HLD Theory
- HLD Problems
- MergedSheet
- Core Sheet
- Short Sheet
- News
Free open topics (Core CS, AI, system design)
- Introduction To DSA
- Language Type Systems Quick Reference
- Data, Information & Database
- What Is a DBMS
- Role of the OS
- Types of OS
- Goals
- Core Problems Networks Solve
- Procedural Limits
- What OOP Gives You
- What LLD Is
- What Interviewers Evaluate
- Interview Flow
- NFR Checklist
- What System Design Is
- How to Approach Any Design Problem
- Large Language Models and ChatGPT Shape
- Foundation Models and GenAI vs AGI
- Why Python is the Standard for AI
- Choosing a Python Version